BallGuessr is a web-based trivia game in which players identify professional footballers from career-related clues. The game is accessible for free through the ballguessr.eu website and requires no additional software or account setup to begin playing. The game offers three primary modes. A Daily mode presents a new set of clues each day, giving players a single puzzle to solve within a defined cycle. A Free play mode allows users to attempt unlimited puzzles at their own pace without time restrictions. A Multiplayer mode supports group play, enabling friends to compete or cooperate in the same session, which makes the game suitable for social gatherings. During gameplay, users are shown clues that reference a footballer's career history, such as clubs, positions, national team appearances, or notable achievements. Players submit guesses based on these clues and receive feedback that helps them refine their answer. The difficulty and range of clues draw on professional football careers across different leagues and eras. BallGuessr runs directly in a browser, so it works on desktop and mobile devices that have internet access.